Station 1- Vocabulary Match the terms to their meaning and write down the definition on your review sheet. Vocabulary Term 1.Energy 2.Passive Transport 3.Active Transport 4.Diffusion 5.Channel Protein 6.Osmosis 7.Equilibrium Definitions A. When the molecules of a substance are spread evenly throughout another substance B. The random movement of air particles from high to low concentration C. The diffusion of water through a membrane D. Particle movement from an area of lower concentration to an area of high concentration E. Particle movement from an area of higher concentration to an area of low concentration F. Is used to move molecules during active transport but not during passive transport G. Transport molecule that provides a tube-like opening in the membrane through which particles can diffuse

Station 2- Passive vs. Active Transport Passive Transport Active Transport Use the following terms to fill in the Venn Diagram: uses energy, does not use energy, osmosis, diffusion, Endocytosis, High to low concentration, low to high concentration, movement of oxygen and carbon dioxide, movement of molecules, exocytosis

Station 3- Osmosis Osmosis Practice Water will flow ____________ Osmosis is the diffusion of water from an area of high concentration to an area of low concentration. Only water moves in osmosis! The diagrams on your review show the concentration of water and salt inside the cell and the concentration of water and salt surrounding the cell. Complete the sentences below by comparing the concentration of the water inside the cell and the concentration outside the cell. Draw the cells on your review sheet. Water will flow ____________ (into the cell, out of the cell, in both directions). The cell will ______ (shrink, burst, stay the same). C. 95%water 5% solute A. 5% water 95% solute 95% water 5% solute 95%water 5% solute B. 95% water 5% solute 5% water 95% solute Students will fill the sentence for all cells separately.

Station 4- Diffusion 1.Review the definition of Diffusion and then explain what is happening in the picture to left. 2. What type of transport is diffusion? Active or Passive Transport- does it require energy? 3.Give an example of diffusion.

Station 5- Cell Membrane 1. The structure most responsible for maintaining cell homeostasis is the cell wall b. plasma membrane 2. A plasma membrane is made up of a(n) a. enzyme layer b. lipid bilayer 3. Diffusion continues until equilibrium is reached b. one side has more 4. If a cell is placed in salt water, water leaves the cell by osmosis b. diffusion 5. A cell moves particle from a region of low concentration to a region of high concentration passive transport b. active transport

Station 6- Solutions Students will look at the cells and explain why the cells are Hypertonic, Isotonic and Hypotonic. What type of solution would cause them to be in this state.

Station 7- Homeostasis How do plasma (cell) membranes maintain homeostasis for a cell? (Answer in 2 complete sentences) 2. How do you know a cell has reached its equilibrium? Hint* Think of the concentration inside and outside a cell. (Answer in 2 complete sentences)